Kramertunnel
Rerouting B 23 and construction of the Kramertunnel (2 lane road tunnel)
Client
Staatliches Bauamt Weilheim
Münchener Straße 39
82362 Weilheim
Germany
Contractor
BeMo Tunnelling GmbH, Niederlassung West
in Joint Venture „JV Kramertunnel“ with Subterra a.s.
BeMo-share 70 %
Project location
82467 Garmisch-Partenkirchen
Germany
Start of construction
2019
End of construction
2023
Project total value
150 million €
Geology
Kramer-Massif (predominant Carbonate/solid rocks and soft ground).
Solid rocks: main dolomite, platy limestone, Kössen formation. Overlying quarternary soft ground material such as Morain-/rockfall sediments, mudslide-/gravel sediments, slope debris and alluvial valley sediments.
Technical Data
Construction of a 2-lane road tunnel (1 tube) incl. completion of a rescue tunnel; ventilation shaft incl. ventilation structure (structural works), trough structure at the North Portal and tunnel access areas North and South.
Tunnel
• Length: 3,609.00 m
• Conventional Driving: 3,524.00 m
- thereof in solid rocks: 2,977.00 m
- thereof in soft ground: 574.00 m
• Cut-and-Cover method: 85.00 m
• Cross-section: ≤ 157.00 m²
• Execution: by drill and blast and roadheader, excavator, NATM
• Support: shotcrete, tunnel archs/ lattice girder, wire mesh
• Secondary lining: in-situ concrete reinforced/unreinforced
Rescue Tunnel
• Length: 3,703.00 m
• Conventional Driving 349.00 m
- thereof in soft ground: 349.00 m
• Cut-and-Cover method: 22.00 m
• Cross-section: ≤ 43.00 m²
• Execution: by roadheader, excavator, NATM
• Support: shotcrete, tunnel archs/ lattice girder, wire mesh
• Secondary lining: in-situ concrete reinforced/unreinforced
Shaft
• Depth: 118 m / Sinking Depth: 79 m / Ø: 4.50m
Secondary Lining: in-situ concrete, reinforced
Further project related information
• Construction road junction Garmisch/Burgrain
• New construction operations building
• Ground engineering works (anchored retaining walls) as well as water drainage works (vertical filter well and gravel piles)
• Structural Analysis and Detailed Design by BeMo’s Tunnel Design Department